Polyurethanes from trans-cyclohexane-1,4-diisocyanate

US4256869A · kind A · utility

Assignee

• Akzo N.V. · NL

Inventors

• Helmut Schulze · Großwallstadt, DE
• Hans Zengel · Kleinwallstadt, DE
• Walter Brodowski · Amorbach, DE
• Franciscus J. Huntjens · Arnhem, NL
• Jan A. J. Schutijser · Dieren, NL
• Peter Hentschel · Hemsbach, DE

Key dates

• Filing date: Jun 28, 1979
• Grant date: Mar 17, 1981
• Expiry date: Jun 28, 1999

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08G18/751
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

Polyurethanes prepared from macrodiols with an average molecular weight between about 800 and 4000, lower molecular weight chain extenders with at least two labile hydrogens, and cyclohexane-1,4-diisocyanate with a trans-isomer content of at least 90%, are described. These polyurethanes exhibit exceptional mechanical properties, high softening temperatures, and remarkable stability to light and to many common solvents. Methods for preparation of the novel polyurethanes, as well as for their use, are also disclosed.